Hello UA Peeps!

Brother is looking at J or F UA Award Tickets from West Coast USA to JNB.

We would like to book 4, if possible, and can plan very far in advance.

I flew almost 200k BIS miles this year between OW and DL but know nothing about UA Mileage tickets.

How far out do they book and what is the best metal to JNB? Will it be possible to get 4 tickets?

Is UA.com the best website to check *A availability?

Thanks!!!